Dust cap for tire valves and the like



A. FESSLER DUST CAP FOR TIRE VALVES AND THE LIKE Oct. 30 1923.

Filed March 25, 1922 Patented Oct. 30, 1923.

UNITED STATES ALBERT FESSLER, OF HIGH BRIDGE, NEW JERSEY.

DUST CAP FOR TIRE VALVES AND THE LIKE.

Application filed March 25, 1922.

To all whom it may concern:

Be it known that I, ALBERT FEssLnR, a citizen of the United States, residing at High Bridge, in the county of Hunterdon and State of New Jersey, have invented certain new and useful Improvements in Dust Caps for Tire Valves and the like, of which the following is a specification.

My invention relates to valves for inflat ing tires and the like and more particularly to dust and water excluding provisions.

Principal objects are to provide a cap capable of ready application and removal and having desirable air sealing properties, and to provide a cap assembly including water and dust excluding provisions for both the cap and the rim. V

Broadly, the invention embodies a cap capable of limited engagement with the usual stem and having a shouldered portion which seats against the shoulder of the stem.

Specifically, the invention embodies a cap of the nature stated constructed of soft metal, as for example lead or its equivalent, so that its co-operating shouldered portion is capable of more or lesspeening or deformation under moderate pressure in order to secure an air-tight seat on the shoulder of the stem. 7

Further stated, the invention embodies a cap of the nature stated combined with a stem housing.

Further stated, the invention is embodied in a dust cap having an extensible skirtor curtain for co-operation with the stem or stem housing. 7

With such and other objects and advantages in view, the nature, characteristic features and scope of the invention will more readily be understood from the following description taken in connection with the accompanying drawing, wherein Figure 1 is a perspective view illustrating the application of the invention.

Fig. 2 is a sectional view of a stem terminal with my improved cap applied.

Fig. 3 is an elevational view of the cap and stem housing assembly.

Figs. t and 5 are elevational views illustrating more particularly a dust cap equipped with a rolling skirt or curtain.

Serial No. 546,636.

In the drawing, the numeral represents the usual valve stem; 6 represents the usual valve; and 7 represents the usual stem shoulder. short cap 8 is provided. The cap 8 is capable of limited engagement with the stem through the agency of an internally threaded surface 9 which is arrested by an inwardly directed shoulder 10. Back of the shoulder 10 is a chamber or recess 11 which affords ample clearance for the head of the stem and for any protruding parts of the valve.

As stated at the outset the cap 8 is preferably constructed of a relatively soft metal such as lead or its equivalent. The purpose and effect of this is to establish an air-tight seal between the co-acting shoulders of the stem and cap, the cap shoulder being capable of more or less peening or flowing under the pressure generated in screwing the cap to place, and in order to facilitate the applica tion and removal of the cap it may have ridges or gripping surfaces 12.

Fig. 3 shows a cap of the nature indicated co-operating with a stem housing 18 which may be a section of rubber tubing of a length sufiicient to seal the rim opening 14 and to form a sealing closure with the cap.

Figs. 4 and 5 illustrate a modification in which a short cap 15 is provided with an extensible shroud or curtain 16 which cooperates with the stem or stem housing or at any rate covers the end of the cap. In the preferred embodiment of this part of my invention, the shroud or curtain 16 is a cylindrical section of pliant rubber, silk, or other suitable material capable of being extended as in Fig. 5 or of being rolled back upon the cap as in Fig. 4.

The collar 17 when present is useful to limit the movement of the stem with respect to the rim and to compensate for wear on the stem housing 18 so as to effectively seal the joints.

Having claim 1. A dust cap having a relatively short internally threaded surface arrested by an inwardly directed sealing shoulder, with a recess extending back of the shoulder.

described my invention, I

According to my invention a threaded surface arrested by a sealing shoulder capable of peening or flowing under eX- erted pressure with a recess extending back 10 of the shoulder, the wall of the cap being reinforced in the zone of the shouldered portion.

In testimony whereof I affix niy signature.

ALBERT FESSLERV 

